You look lesser shy there. And also more restrained than extraverts and more concentrated than P types are.
Your talking style on the forum has good structure. What appeares when people prepare better before doing or saying, what relates to J.
LSI fits you more than other types, anyway.
To distinguish between LSI and ESE is possibly by IR effects with types good for one and bad for other.
As an example: ESE and ILI. ESE are liked by LSI (semiduality) significantly more than by SLE (orderer; "заказчик" is original term for this IR - the ones who gives orders). ILI inspire higher personal sympathy for SLE (semiduality) and among worst for LSI (orderer). If you have SLE you should like ILI more than ESE, while having LSI you should notice the opposite.
The best way to check your type by IR is to find several people of each type among those with who you communicate IRL significantly. Easier way as a start is to use bloggers examples.